Stability of Ni in nitinol oxide surfaces.

Tian H; Schryvers D; Liu D; Jiang Q; Van Humbeeck J

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Stability of Ni in nitinol oxide surfaces.

机译：镍钛合金氧化物表面的镍稳定性。

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The stability of Ni in titanium oxide surface layers on nitinol wires known to release certain amounts of Ni was investigated by first principles density functional theory and transmission electron microscopy. The oxides were identified as a combination of TiO and TiO(2) depending on the thickness of the layer. The calculations indicate that free Ni atoms can exist in TiO at ambient temperature while Ni particles form in TiO(2), which was confirmed by the transmission electron microscopy observations. The results are discussed with respect to surface stability and Ni release due to free Ni atoms and Ni particles.

机译：通过第一原理密度泛函理论和透射电子显微镜研究了已知可释放一定量Ni的镍钛诺丝上的氧化钛表面层中Ni的稳定性。取决于层的厚度，将氧化物确定为TiO和TiO（2）的组合。计算表明，在室温下，TiO中可以存在自由的Ni原子，而在TiO（2）中则形成Ni颗粒，这已通过透射电子显微镜观察得到了证实。讨论了有关表面稳定性和游离Ni原子和Ni颗粒释放Ni的结果。

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《Acta biomaterialia》 |2011年第2期|共8页
作者
Tian H; Schryvers D; Liu D; Jiang Q; Van Humbeeck J;
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正文语种 eng
中图分类普通生物学;
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Stability of Ni in nitinol oxide surfaces.

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